* El bromista: This is the most common translation for "joker" in the sense of a person who likes to joke around.
* El bufón: This is a more formal word for "joker" and can also refer to a court jester.
* El payaso: This means "clown" and can be used to refer to a joker, but it's more specific to someone who performs comedic acts.
The best translation depends on the specific context. For example, if you're talking about the character "Joker" from Batman, you could say "El Joker" or "El Guasón" (which is more specific to the character).